Abstract: Basalt was used to produce powder, then the powder was used to spray on steel and aluminum plates with APS technology in order to create a new mineral coating. The powder of basalt appeared prismatic structure. Powder was mainly composed of SiO_2,K_2O,CaO,Fe_2O_3,Al_2O_3 and the size of them was in 80-200 μm range. The flowability of powder was better. The structure of coating was analysed by SEM and X-ray diffraction methods. The result of experiment shows that there are some holes and micro cracks on surface of coating and structure of coating is amorphous. The bond of coating with intermediate layer is better. The max thickness of coating is about 134 μm and micro hardness of coating is 593-928 Hv_100.

Key words: atmospheric plasma spraying%basalt coating%coating properties and structure